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https://issues.apache.org/jira/browse/HADOOP-1824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12564933#action_12564933
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Doug Cutting commented on HADOOP-1824:
--------------------------------------
It looks like minizip is out, then. The unzip code is based on a file
descriptor, but there are only 35 lines that touch that file descriptor, so it
might not be too hard to modify it to read from something else. But then we
have to maintain a branched version of that. Sigh.
> want InputFormat for zip files
> ------------------------------
>
> Key: HADOOP-1824
> URL: https://issues.apache.org/jira/browse/HADOOP-1824
> Project: Hadoop Core
> Issue Type: New Feature
> Components: mapred
> Affects Versions: 0.15.2
> Reporter: Doug Cutting
> Attachments: ZipInputFormat_fixed.patch
>
>
> HDFS is inefficient with large numbers of small files. Thus one might pack
> many small files into large, compressed, archives. But, for efficient
> map-reduce operation, it is desireable to be able to split inputs into
> smaller chunks, with one or more small original file per split. The zip
> format, unlike tar, permits enumeration of files in the archive without
> scanning the entire archive. Thus a zip InputFormat could efficiently permit
> splitting large archives into splits that contain one or more archived files.
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